Add note to unused shaders

Author: JoseEmilio-ARM

attachments/38_ray_tracing.frag

@@ -8,5 +8,6 @@ layout(location = 1) in vec2 fragTexCoord;
 layout(location = 0) out vec4 outColor;
 
 void main() {
+    // Not used, see Slang shader
     outColor = texture(texSampler, fragTexCoord);
 }

attachments/38_ray_tracing.vert

@@ -14,6 +14,7 @@ layout(location = 0) out vec3 fragColor;
 layout(location = 1) out vec2 fragTexCoord;
 
 void main() {
+    // Not used, see Slang shader
     gl_Position = ubo.proj * ubo.view * ubo.model * vec4(inPosition, 1.0);
     fragColor = inColor;
     fragTexCoord = inTexCoord;